RCD test log calculator

RCD test log calculator technical guide

Use this calculator when an Australian RCD or RCBO record contains several entered rows and the next task is to summarise the log. It counts rows that need review, shows the row references, and reports basic trip-time statistics from finite measured values.

The calculator is deliberately narrow. It does not choose test intervals, publish hidden timing criteria, replace the original instrument record or decide the project action. It keeps each row's device label, row type, criterion and outcome visible so the summary does not hide a row-level concern.

Field Use Cases

A useful log summary names the device row that needs attention. A weak summary only says the register is complete and leaves the next reviewer searching for the row that caused the concern.

Input Basis

Every row remains user-entered. The calculator does not decide whether the row was required, whether the method was correct, or whether the project file is complete.

Multi-row log boundary

The log calculator is a summary layer over row-level RCD test logic. It does not change a row result to make the log look cleaner. If one row records an unexpected trip, a timed no-trip row, an above-time row or a function row needing review, that row remains visible in the review list.

Use the single-row checker when one row needs close inspection. Use this page when the task is to count and summarise several rows from the same board, asset group, handover pack or maintenance register.

Result Interpretation

Trip-time statistics are secondary. They help compare rows, but they do not replace the row status or the source record. A fast average cannot cancel a review row.

Worked Australian Examples

The examples use Australian RCD and RCBO wording, metric current and time units, and user-entered criteria. They are worksheet records, not instructions to alter the test method.

Australian RCD Record Boundary

Australian RCD and RCBO logs can sit inside installation verification, workplace maintenance, equipment management and manufacturer-documentation workflows. Current standards, site procedures, device instructions and competent-person review can override the worksheet basis.

Use the output as a log summary. Do not use it as an original test record, device selection decision, rectification close-out record or final project decision.

Stop Points

• A row reference cannot be matched to the original test sheet.
• A device reference does not match the board schedule or asset register.
• The row type is uncertain.
• The criterion basis is not documented.
• A row needs review and the source instrument record is missing.
• The summary is being used to hide a row-level concern.
• The output is being used as an original test record or final project decision.